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The Rochester-based health care system ranked No. 9 on Forbes 2016 list of the country's top employers. Three other Minnesota companies also made the top 100: 3M (No. 51), Fairview Health Services (No. 60) and Medtronic (No. 97).

Forbes developed the list by surveying more than 30,000 Americans employed at large companies and institutions. According to its website, workers were contacted anonymously without the involvement of their employer.

Marathon Petroleum topped the list, followed by Google and Costco.

Mayo Clinic's high ranking in Forbes is consistent with survey results from other publications. The clinic has also made FORTUNE's list of the 100 best companies to work for 13 years straight.